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MX240 and MX480
Ethernet Services Router
Fan Tray Installation Instructions
13 February 2008
Part Number: 530-022145-01
Revision 1
This document describes how to remove and replace the fan tray on a Juniper
Networks MX240 and MX480 Ethernet Services Router. The fan tray and the air filter
make up the cooling system.
Contents
Cooling System ...............................................................................................2
Replacing the Fan Tray ....................................................................................4
Removing the Fan Tray .............................................................................5
Installing the Fan Tray ..............................................................................6
Electrostatic Discharge Point ...........................................................................7
List of Technical Publications ..........................................................................9
Requesting Technical Support .......................................................................16
Revision History ............................................................................................17
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MX240 and MX480 Ethernet Services Router Fan Tray Installation Instructions
Figure 5: Air Filter on an MX240 Router
Figure 6: Air Filter on an MX480 Router
Replacing the Fan Tray
The router has one fan tray that installs vertically in the rear of the chassis. The fan
tray contains three fans on an MX240 router and six fans on an MX480 router. The
fan tray is hot-removable and hot-insertable.
The fan tray is located in the rear of the chassis on the right side. The fan tray weighs
about 6.8 lb (3.08 kg).
NOTE: To prevent overheating, install the replacement fan tray immediately after
removing the existing fan tray.
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Replacing the Fan Tray
Replacing the Fan Tray
To replace the fan tray, use the following procedures:
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Removing the Fan Tray
1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and
connect the strap to one of the ESD points on the chassis. For more information
2. Loosen the captive screws on the fan tray faceplate.
3. Grasp the fan tray handle and pull it out approximately 1 to 3 inches.
WARNING: To avoid injury, keep tools and your fingers away from the fans as you
slide the fan tray out of the chassis. The fans might still be spinning.
4. Press the latch located on the inside of the fan tray to release it from the chassis.
5. Place one hand under the fan tray to support it and pull the fan tray completely
out of the chassis.
Figure 7: Removing the Fan Tray from an MX240 Router
Replacing the Fan Tray
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MX240 and MX480 Ethernet Services Router Fan Tray Installation Instructions
Figure 8: Removing the Fan Tray from an MX480 Router
Installing the Fan Tray
1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and
connect the strap to one of the ESD points on the chassis. For more information
2. Grasp the fan tray handle and insert it straight into the chassis. Note the correct
orientation by the this side up label on the top surface of the fan tray.
3. Tighten the captive screws on the fan tray faceplate to secure it in the chassis.
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Replacing the Fan Tray
Electrostatic Discharge Point
Figure 9: Installing the Fan Tray in an MX240 Router
Figure 10: Installing the Fan Tray in an MX480 Router
Electrostatic Discharge Point
on the rear of the chassis. The illustration shows a DC-powered router, but the location
is the same in AC-powered routers.
Electrostatic Discharge Point
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Preventing Electrostatic Discharge Damage
Preventing Electrostatic Discharge Damage
Many router hardware components are sensitive to damage from static electricity.
Some components can be impaired by voltages as low as 30 V. You can easily
generate potentially damaging static voltages whenever you handle plastic or foam
packing material or if you move components across plastic or carpets. Observe the
following guidelines to minimize the potential for electrostatic discharge (ESD)
damage, which can cause intermittent or complete component failures:
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Always use an ESD wrist strap or ankle strap, and make sure that it is in direct
contact with your skin.
CAUTION: For safety, periodically check the resistance value of the ESD strap. The
measurement should be in the range of 1 to 10 Mohms.
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When handling any component that is removed from the chassis, make sure the
equipment end of your ESD strap is attached to one of the ESD points on the
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Avoid contact between the component and your clothing. ESD voltages emitted
from clothing can still damage components.
When removing or installing a component, always place it component-side up
on an antistatic surface, in an antistatic card rack, or in an electrostatic bag (see
Figure 13 on page 9). If you are returning a component, place it in an
electrostatic bag before packing it.
Figure 13: Placing a Component into an Electrostatic Bag
List of Technical Publications
Table 1 on page 10 lists the software and hardware guides and release notes for
Juniper Networks J-series, M-series, MX-series, and T-series routing platforms and
describes the contents of each document. Table 2 on page 14 lists the books included
Preventing Electrostatic Discharge Damage
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MX240 and MX480 Ethernet Services Router Fan Tray Installation Instructions
release notes supporting JUNOS software with enhanced services. All documents are
Table 4 on page 15 lists additional books on Juniper Networks solutions that you can
order through your bookstore. A complete list of such books is available at
Table 1: Technical Documentation for Supported Routing Platforms
Book Description
JUNOS Software for Supported Routing Platforms
Access Privilege
Explains how to configure access privileges in user classes by using
permission flags and regular expressions. Lists the permission flags
along with their associated command-line interface (CLI) operational
mode commands and configuration statements.
Class of Service
Provides an overview of the class-of-service (CoS) functions of the
JUNOS software and describes how to configure CoS features,
including configuring multiple forwarding classes for transmitting
packets, defining which packets are placed into each output queue,
scheduling the transmission service level for each queue, and
managing congestion through the random early detection (RED)
algorithm.
CLI User Guide
Describes how to use the JUNOS command-line interface (CLI) to
configure, monitor, and manage Juniper Networks routing
platforms. This material was formerly covered in the JUNOS System
Basics Configuration Guide.
Feature Guide
Provides a detailed explanation and configuration examples for
several of the most complex features in the JUNOS software.
High Availability
Provides an overview of hardware and software resources that
ensure a high level of continuous routing platform operation and
describes how to configure high availability (HA) features such as
nonstop active routing (NSR) and graceful Routing Engine
switchover (GRES).
MPLS Applications
Provides an overview of traffic engineering concepts and describes
how to configure traffic engineering protocols.
Multicast Protocols
Multiplay Solutions
MX-series Solutions Guide
Provides an overview of multicast concepts and describes how to
configure multicast routing protocols.
Describes how you can deploy IPTV and voice over IP (VoIP)
services in your network.
Describes common configuration scenarios for the Layer 2 features
supported on the MX-series routers, including basic bridged VLANs
with normalized VLAN tags, aggregated Ethernet links, bridge
domains, Multiple Spanning Tree Protocol (MSTP), and integrated
routing and bridging (IRB).
Network Interfaces
Provides an overview of the network interface functions of the
JUNOS software and describes how to configure the network
interfaces on the routing platform.
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List of Technical Publications
List of Technical Publications
Table 1: Technical Documentation for Supported Routing Platforms (continued)
Book
Description
Network Management
Provides an overview of network management concepts and
describes how to configure various network management features,
such as SNMP and accounting options.
Policy Framework
Routing Protocols
Provides an overview of policy concepts and describes how to
configure routing policy, firewall filters, and forwarding options.
Provides an overview of routing concepts and describes how to
configure routing, routing instances, and unicast routing protocols.
Secure Configuration Guide for Common Criteria Provides an overview of secure Common Criteria and JUNOS-FIPS
and JUNOS-FIPS
protocols for the JUNOS software and describes how to install and
configure secure Common Criteria and JUNOS-FIPS on a routing
platform.
Services Interfaces
Provides an overview of the services interfaces functions of the
JUNOS software and describes how to configure the services
interfaces on the router.
Software Installation and Upgrade Guide
Describes the JUNOS software components and packaging and
explains how to initially configure, reinstall, and upgrade the JUNOS
system software. This material was formerly covered in the JUNOS
System Basics Configuration Guide.
System Basics
VPNs
Describes Juniper Networks routing platforms and explains how
to configure basic system parameters, supported protocols and
software processes, authentication, and a variety of utilities for
managing your router on the network.
Provides an overview and describes how to configure Layer 2 and
Layer 3 virtual private networks (VPNs), virtual private LAN service
(VPLS), and Layer 2 circuits. Provides configuration examples.
JUNOS References
Hierarchy and RFC Reference
Describes the JUNOS configuration mode commands. Provides a
hierarchy reference that displays each level of a configuration
hierarchy, and includes all possible configuration statements that
can be used at that level. This material was formerly covered in
the JUNOS System Basics Configuration Guide.
Interfaces Command Reference
Describes the JUNOS software operational mode commands you
use to monitor and troubleshoot interfaces.
Routing Protocols and Policies Command
Reference
Describes the JUNOS software operational mode commands you
use to monitor and troubleshoot routing policies and protocols,
including firewall filters.
System Basics and Services Command Reference Describes the JUNOS software operational mode commands you
use to monitor and troubleshoot system basics, including
commands for real-time monitoring and route (or path) tracing,
system software management, and chassis management. Also
describes commands for monitoring and troubleshooting services
such as class of service (CoS), IP Security (IPSec), stateful firewalls,
flow collection, and flow monitoring.
List of Technical Publications
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MX240 and MX480 Ethernet Services Router Fan Tray Installation Instructions
Table 1: Technical Documentation for Supported Routing Platforms (continued)
Book
Description
System Log Messages Reference
Describes how to access and interpret system log messages
generated by JUNOS software modules and provides a reference
page for each message.
J-Web User Guide
J-Web Interface User Guide
Describes how to use the J-Web graphical user interface (GUI) to
configure, monitor, and manage Juniper Networks routing
platforms.
JUNOS API and Scripting Documentation
JUNOScript API Guide
Describes how to use the JUNOScript application programming
interface (API) to monitor and configure Juniper Networks routing
platforms.
JUNOS XML API Configuration Reference
JUNOS XML API Operational Reference
NETCONF API Guide
Provides reference pages for the configuration tag elements in the
JUNOS XML API.
Provides reference pages for the operational tag elements in the
JUNOS XML API.
Describes how to use the NETCONF API to monitor and configure
Juniper Networks routing platforms.
JUNOS Configuration and Diagnostic Automation Describes how to use the commit script and self-diagnosis features
Guide
of the JUNOS software. This guide explains how to enforce custom
configuration rules defined in scripts, how to use commit script
macros to provide simplified aliases for frequently used
configuration statements, and how to configure diagnostic event
policies.
Hardware Documentation
Hardware Guide
Describes how to install, maintain, and troubleshoot routing
platforms and components. Each platform has its own hardware
guide.
PIC Guide
DPC Guide
Describes the routing platform's Physical Interface Cards (PICs).
Each platform has its own PIC guide.
Describes the Dense Port Concentrators (DPCs) for all MX-series
routers.
JUNOScope Documentation
JUNOScope Software User Guide
Describes the JUNOScope software graphical user interface (GUI),
how to install and administer the software, and how to use the
software to manage routing platform configuration files and monitor
routing platform operations.
Advanced Insight Solutions (AIS) Documentation
Advanced Insight Solutions Guide
Describes the Advanced Insight Manager (AIM) application, which
provides a gateway between JUNOS devices and Juniper Support
Systems (JSS) for case management and intelligence updates.
Explains how to run AI scripts on Juniper Networks devices.
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List of Technical Publications
List of Technical Publications
Table 1: Technical Documentation for Supported Routing Platforms (continued)
Book
Description
J-series Routing Platform Documentation
Getting Started Guide
Provides an overview, basic instructions, and specifications for
J-series routing platforms. The guide explains how to prepare your
site for installation, unpack and install the router and its
components, install licenses, and establish basic connectivity. Use
the Getting Started Guide for your router model.
Basic LAN and WAN Access Configuration Guide Explains how to configure the interfaces on J-series Services Routers
for basic IP routing with standard routing protocols, ISDN backup,
and digital subscriber line (DSL) connections.
Advanced WAN Access Configuration Guide
Explains how to configure J-series Services Routers in virtual private
networks (VPNs) and multicast networks, configure data link
switching (DLSw) services, and apply routing techniques such as
policies, stateless and stateful firewall filters, IP Security (IPSec)
tunnels, and class-of-service (CoS) classification for safer, more
efficient routing.
Administration Guide
Shows how to manage users and operations, monitor network
performance, upgrade software, and diagnose common problems
on J-series Services Routers.
Release Notes
JUNOS Release Notes
Summarize new features and known problems for a particular
software release, provide corrections and updates to published
JUNOS, JUNOScript, and NETCONF manuals, provide information
that might have been omitted from the manuals, and describe
upgrade and downgrade procedures.
Hardware Release Notes
JUNOScope Release Notes
AIS Release Notes
Describe the available documentation for the routing platform and
summarize known problems with the hardware and accompanying
software. Each platform has its own release notes.
Contain corrections and updates to the published JUNOScope
manual, provide information that might have been omitted from
the manual, and describe upgrade and downgrade procedures.
Summarize AIS new features and guidelines, identify known and
resolved problems, provide information that might have been
omitted from the manuals, and provide initial setup, upgrade, and
downgrade procedures.
AIS AI Script Release Notes
Summarize AI Scripts new features, identify known and resolved
problems, provide information that might have been omitted from
the manuals, and provide instructions for automatic and manual
installation, including deleting and rolling back.
J-series Services Router Release Notes
Briefly describe Services Router features, identify known hardware
problems, and provide upgrade and downgrade instructions.
List of Technical Publications
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MX240 and MX480 Ethernet Services Router Fan Tray Installation Instructions
Table 2: JUNOS Software Network Operations Guides
Book
Description
Baseline
Describes the most basic tasks for running a network using Juniper
Networks products. Tasks include upgrading and reinstalling JUNOS
software, gathering basic system management information,
verifying your network topology, and searching log messages.
Interfaces
MPLS
Describes tasks for monitoring interfaces. Tasks include using
loopback testing and locating alarms.
Describes tasks for configuring, monitoring, and troubleshooting
an example MPLS network. Tasks include verifying the correct
configuration of the MPLS and RSVP protocols, displaying the status
and statistics of MPLS running on all routing platforms in the
network, and using the layered MPLS troubleshooting model to
investigate problems with an MPLS network.
MPLS Log Reference
Describes MPLS status and error messages that appear in the output
of the show mpls lsp extensive command. The guide also describes
how and when to configure Constrained Shortest Path First (CSPF)
and RSVP trace options, and how to examine a CSPF or RSVP
failure in a sample network.
MPLS Fast Reroute
Hardware
Describes operational information helpful in monitoring and
troubleshooting an MPLS network configured with fast reroute
(FRR) and load balancing.
Describes tasks for monitoring M-series and T-series routing
platforms.
To configure and operate a J-series Services Router running JUNOS software with
enhanced services, you must also use the configuration statements and operational
mode commands documented in JUNOS configuration guides and command
references. To configure and operate a WX Integrated Services Module, you must
also use WX documentation.
Table 3: JUNOS Software with Enhanced Services Documentation
Book Description
JUNOS Software with Enhanced Services Design Provides guidelines and examples for designing and
and Implementation Guide
implementing IP Security (IPSec) virtual private networks
(VPNs), firewalls, and routing on J-series routers running
JUNOS software with enhanced services.
JUNOS Software with Enhanced Services J-series Explains how to quickly set up a J-series router. This
Services Router Quick Start document contains router declarations of conformity.
JUNOS Software with Enhanced Services J-series Provides an overview, basic instructions, and specifications
Services Router Getting Started Guide
for J-series Services Routers. This guide explains how to
prepare a site, unpack and install the router, replace router
hardware, and establish basic router connectivity. This guide
contains hardware descriptions and specifications.
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List of Technical Publications
List of Technical Publications
Table 3: JUNOS Software with Enhanced Services Documentation (continued)
Book
Description
JUNOS Software with Enhanced Services
Migration Guide
Provides instructions for migrating an SSG device running
ScreenOS software or a J-series router running the JUNOS
software to JUNOS software with enhanced services.
JUNOS Software with Enhanced Services
Interfaces and Routing Configuration Guide
Explains how to configure J-series router interfaces for basic
IP routing with standard routing protocols, ISDN service,
firewall filters (access control lists), and class-of-service (CoS)
traffic classification.
JUNOS Software with Enhanced Services Security Explains how to configure and manage security services
Configuration Guide
such as stateful firewall policies, IPSec VPNs, firewall screens,
Network Address translation (NAT) and Router interface
modes, Public Key Cryptography, and Application Layer
Gateways (ALGs).
JUNOS Software with Enhanced Services
Administration Guide
Shows how to monitor the router and routing operations,
firewall and security services, system alarms and events,
and network performance. This guide also shows how to
administer user authentication and access, upgrade software,
and diagnose common problems.
JUNOS Software with Enhanced Services CLI
Reference
Provides the complete JUNOS software with enhanced
services configuration hierarchy and describes the
configuration statements and operational mode commands
not documented in the standard JUNOS manuals.
WXC Integrated Services Module Installation and Explains how to install and initially configure a WXC
Configuration Guide
Integrated Services Module in a J-series router for application
acceleration.
JUNOS Software with Enhanced Services Release Summarize new features and known problems for a
Notes
particular release of JUNOS software with enhanced services
on J-series routers, including J-Web interface features and
problems. The release notes also contain corrections and
updates to the manuals and software upgrade and
downgrade instructions for JUNOS software with enhanced
services.
Book
Description
Interdomain Multicast
Routing
Provides background and in-depth analysis of multicast routing using Protocol Independent
Multicast sparse mode (PIM SM) and Multicast Source Discovery Protocol (MSDP); details
any-source and source-specific multicast delivery models; explores multiprotocol BGP (MBGP)
and multicast IS-IS; explains Internet Gateway Management Protocol (IGMP) versions 1, 2, and
3; lists packet formats for IGMP, PIM, and MSDP; and provides a complete glossary of multicast
terms.
JUNOS Cookbook
Provides detailed examples of common JUNOS software configuration tasks, such as basic router
configuration and file management, security and access control, logging, routing policy, firewalls,
routing protocols, MPLS, and VPNs.
List of Technical Publications
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MX240 and MX480 Ethernet Services Router Fan Tray Installation Instructions
Book
Description
MPLS-Enabled Applications
Provides an overview of Multiprotocol Label Switching (MPLS) applications (such as Layer 3
virtual private networks [VPNs], Layer 2 VPNs, virtual private LAN service [VPLS], and
pseudowires), explains how to apply MPLS, examines the scaling requirements of equipment
at different points in the network, and covers the following topics: point-to-multipoint label
switched paths (LSPs), DiffServ-aware traffic engineering, class of service, interdomain traffic
engineering, path computation, route target filtering, multicast support for Layer 3 VPNs, and
management and troubleshooting of MPLS networks.
OSPF and IS-IS: Choosing an Explores the full range of characteristics and capabilities for the two major link-state routing
IGP for Large-Scale Networks protocols: Open Shortest Path First (OSPF) and IS-IS. Explains architecture, packet types, and
addressing; demonstrates how to improve scalability; shows how to design large-scale networks
for maximum security and reliability; details protocol extensions for MPLS-based traffic
engineering, IPv6, and multitopology routing; and covers troubleshooting for OSPF and IS-IS
networks.
Routing Policy and Protocols Provides a brief history of the Internet, explains IP addressing and routing (Routing Information
for Multivendor IP Networks Protocol [RIP], OSPF, IS-IS, and Border Gateway Protocol [BGP]), explores ISP peering and
routing policies, and displays configurations for both Juniper Networks and other vendors'
routers.
The Complete IS-IS Protocol
Provides the insight and practical solutions necessary to understand the IS-IS protocol and how
it works by using a multivendor, real-world approach.
Requesting Technical Support
Technical product support is available through the Juniper Networks Technical
Assistance Center (JTAC). If you are a customer with an active J-Care or JNASC support
contract, or are covered under warranty, and need postsales technical support, you
can access our tools and resources online or open a case with JTAC.
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JTAC policies—For a complete understanding of our JTAC procedures and policies,
review the JTAC User Guide located at
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Product warranties—For product warranty information, visit
JTAC Hours of Operation —The JTAC centers have resources available 24 hours
a day, 7 days a week, 365 days a year.
Self-Help Online Tools and Resources
For quick and easy problem resolution, Juniper Networks has designed an online
self-service portal called the Customer Support Center (CSC) that provides you with
the following features:
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Requesting Technical Support
Requesting Technical Support
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Find CSC offerings: http://www.juniper.net/customers/support/
Search for known bugs: http://www2.juniper.net/kb/
Find product documentation: http://www.juniper.net/techpubs/
Find solutions and answer questions using our Knowledge Base:
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Download the latest versions of software and review release notes:
Search technical bulletins for relevant hardware and software notifications:
Join and participate in the Juniper Networks Community Forum:
Open a case online in the CSC Case Manager: http://www.juniper.net/cm/
To verify service entitlement by product serial number, use our Serial Number
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Opening a Case with JTAC
You can open a case with JTAC on the Web or by telephone.
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Call 1-888-314-JTAC (1-888-314-5822 toll-free in the USA, Canada, and Mexico).
For international or direct-dial options in countries without toll-free numbers, visit
Revision History
13 February 2008—530-022145-01 Revision 1. Added the MX240 Router
12 September 2007—530-020797-01 Revision 1.
Copyright © 2008, Juniper Networks, Inc. All rights reserved.
Juniper Networks, the Juniper Networks logo, NetScreen, and ScreenOS are registered trademarks of Juniper Networks, Inc. in the United States and other
countries. JUNOS and JUNOSe are trademarks of Juniper Networks, Inc. All other trademarks, service marks, registered trademarks, or registered service
marks are the property of their respective owners.
Juniper Networks assumes no responsibility for any inaccuracies in this document. Juniper Networks reserves the right to change, modify, transfer, or
otherwise revise this publication without notice.
Products made or sold by Juniper Networks or components thereof might be covered by one or more of the following patents that are owned by or licensed
to Juniper Networks: U.S. Patent Nos. 5,473,599, 5,905,725, 5,909,440, 6,192,051, 6,333,650, 6,359,479, 6,406,312, 6,429,706, 6,459,579, 6,493,347,
6,538,518, 6,538,899, 6,552,918, 6,567,902, 6,578,186, and 6,590,785.
Requesting Technical Support
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